/* eslint-disable no-unused-vars */
import { auth, authAll } from '../util/index'

export default function directive(app) {
    // 注册 v-auth 和 v-auth-all 指令
    app.directive('auth', {
        mounted: (el, binding) => {
            if (!auth(binding.value)) {
                el.remove()
            }
        }
    })
    app.directive('auth-all', {
        mounted: (el, binding) => {
            if (!authAll(binding.value)) {
                el.remove()
            }
        }
    })
    // v-dialogDrag: 弹窗拖拽
    app.directive('dialogdrag', {
        // 渲染完毕
        mounted(el, binding) {
            // binding.arg
            // binding.value
            if (!binding.value) return
            const dialogHeaderEl = el.querySelector('.el-dialog__header')
            if(!dialogHeaderEl) return

            const dragDom = el.querySelector('.el-dialog')
            dialogHeaderEl.style.cursor = 'move'
            // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
            const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)
            dialogHeaderEl.onmousedown = e => {
                // 鼠标按下，计算当前元素距离可视区的距离
                const disX = e.clientX - dialogHeaderEl.offsetLeft
                const disY = e.clientY - dialogHeaderEl.offsetTop
                const screenWidth = document.body.clientWidth // body当前宽度
                const screenHeight = document.documentElement.clientHeight // 可见区域高度(应为body高度，可某些环境下无法获取)
                const dragDomWidth = dragDom.offsetWidth // 对话框宽度
                const dragDomheight = dragDom.offsetHeight // 对话框高度
                const minDragDomLeft = dragDom.offsetLeft
                const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth
                const minDragDomTop = dragDom.offsetTop
                const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight

                // 获取到的值带px 正则匹配替换
                let styL, styT
                // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
                if (sty.left.includes('%')) {
                    styL = +document.body.clientWidth * (+sty.left.replace(/\\%/g, '') / 100)
                    styT = +document.body.clientHeight * (+sty.top.replace(/\\%/g, '') / 100)
                } else {
                    styL = +sty.left.replace(/\px/g, '')
                    styT = +sty.top.replace(/\px/g, '')
                }
                document.onmousemove = function(e) {
                    // 通过事件委托，计算移动的距离
                    let left = e.clientX - disX
                    let top = e.clientY - disY
                    // 边界处理
                    if (-left > minDragDomLeft) {
                        left = -minDragDomLeft
                    } else if (left > maxDragDomLeft) {
                        left = maxDragDomLeft
                    }
                    if (-top > minDragDomTop) {
                        top = -minDragDomTop
                    } else if (top > maxDragDomTop) {
                        top = maxDragDomTop
                    }
                    // 移动当前元素
                    dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`
                }
                document.onmouseup = function(e) {
                    document.onmousemove = null
                    document.onmouseup = null
                }
            }
        }
    })
}
